28743403 has 8 divisors (see below), whose sum is σ = 31153808. Its totient is φ = 26361504.

The previous prime is 28743401. The next prime is 28743467. The reversal of 28743403 is 30434782.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28743403 - 2¹ = 28743401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28743401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5001 + ... + 9082.

It is an arithmetic number, because the mean of its divisors is an integer number (3894226).

Almost surely, 2^28743403 is an apocalyptic number.

28743403 is a deficient number, since it is larger than the sum of its proper divisors (2410405).

28743403 is a wasteful number, since it uses less digits than its factorization.

28743403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14253.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 28743403 is about 5361.2874386662. The cubic root of 28743403 is about 306.3228504741.

The spelling of 28743403 in words is "twenty-eight million, seven hundred forty-three thousand, four hundred three".